<template>
    <el-container class="home-container">
      <!-- 头部 -->
    <el-header>
      <div>
        <img src="../assets/bmw.png" alt="" width="55" height="55">
        <span>电商后台管理系统</span>
      </div>
      <el-button type="info" @click="logout">退出</el-button>
      </el-header>
    <!-- 主体 -->
    <el-container>
      <!-- 侧边栏 -->
      <el-aside :width="isCollapse ? '64px' : '200px'">
        <div class="toggle-button" @click="toggleColapse">|||</div>
        <!-- 侧边栏菜单区域 -->
        <el-menu
          background-color="#333744"
          text-color="#fff"
          active-text-color="#409eff" 
          unique-opened 
          :collapse="isCollapse"
          :collapse-transition="false" 
          router 
          :default-active="activePath">
          <!-- 一级菜单 -->
          <el-submenu :index="''+item.id" v-for="item in menuList" :key="item.id">
            <!-- 一级菜单模板区域 -->
            <template slot="title">
              <!-- 图标 -->
              <i :class="iconsObj[item.id]"></i>
              <!-- 文本 -->
              <span>{{item.authName}}</span>
            </template>
            <!-- 二级菜单 -->
            <el-menu-item :index="'/'+sumItem.path" v-for="sumItem in item.children" :key="sumItem.id" @click="saveNavState('/'+sumItem.path)">
              <!-- 二级菜单模板区域 -->
              <template slot="title">
              <!-- 图标 -->
              <i class="el-icon-menu"></i>
              <!-- 文本 -->
              <span>{{sumItem.authName}}</span>
            </template>
            </el-menu-item>
          </el-submenu>
        </el-menu>
      </el-aside>
      <!-- 右侧内容主体 -->
      <el-main>
        <!-- 路由占位符 -->
        <router-view></router-view>
        </el-main>
    </el-container>
  </el-container>
</template>

<script>
import {getMenuApi} from '../api/menuApi'
export default {
    name: 'hone',
    data(){
      return{
        // 导航菜单列表
        menuList: [],
        // 导航菜单图标
        iconsObj: {
          '125': 'el-icon-s-custom',
          '103': 'el-icon-s-grid',
          '101': 'el-icon-shopping-bag-1',
          '102': 'el-icon-document',
          '145': 'el-icon-s-platform'
        },
        // 是否折叠
        isCollapse: false,
        // 被激活的连接地址
        activePath: '',
      }
    },
    methods:{
      logout(){
        window.sessionStorage.clear()
        this.$router.push('/login')
      },
      // 获取所有的菜单
      async getMenuList() {
        const data = await getMenuApi
        if(data.status !== 200) return this.$message.error(res.meta.msg)
        this.menuList = data.data
      },
      // 点击按钮切换菜单的折叠和展开
      toggleColapse(){
        this.isCollapse = !this.isCollapse
      },
      // 保存连接的激活状态
      saveNavState(activePath) {
        window.sessionStorage.setItem('activePath', activePath)
        this.activePath = activePath
      }
    },
    created(){
      this.getMenuList()
      this.activePath = window.sessionStorage.getItem('activePath')
    }
}
</script>

<style scoped>
.home-container{
  height: 100%;
}
  .el-header{
    background-color: #373d41;
    display: flex;
    justify-content: space-between;
    padding-left: 0;
    align-items: center;
    color: #fff;
    font-size: 20px;
  }
  .el-header > div{
    display: flex;
    align-items: center;
  }
  .el-header > div > span{
    margin-left: 15px;
  }
  .el-aside{
    background-color: #333744;
  }
  .el-main{
    background-color: #eaedf1;
  }
  .el-aside .el-menu{
    border-right: none;
  }
  .toggle-button{
    background-color: #4a5064;
    font-size: 10px;
    line-height: 20px;
    color: #fff;
    text-align: center;
    letter-spacing: 0.2em;
    cursor: pointer;
  }
</style>